Automobile doorlock



May16,19 33. n 1 1 J., BCOFFRON 1,908,958`

- AUTOMOBILE DOORLOCK :Filed April 13, 1929 ATTO RN EY5 Patented May 16, 19V-33 l l l UNITED sTATEsr/TENT oFFicE i JOHN B. COFFRN, F DETROIT, MICHIGAN AU'roMoBILE DooRLocx Application led .April 13, 1929. Serial No. 354,748.

The present invention pertains to a novel show a slightly modified fori-n of my invenlocking mechanism, particularly referring to tion, and

that class of antonio iledoor locking meeha- Figure 3 is a cross' sectional view on the nisms which are manipulated from the inline 3-3 of Figure 2.

terior of the automobile to prevent the out- Like characters are employed to indicate 55 side handle from operating the latch and .the corresponding parts throughout. permitting the door Ato open. In reference to Figure 1 the numeral indi- The primaryobject. of the present inven' .Cates a4 fragment 'of an automobile door havtion is to devise an automobile door lock ing a cavity or recess 2 in which is inserted 0 which may be manipulated from the :interior a plate-3 having a Harwell provided with a 60 of the automobile. to render the outsidehanlatch bolt opening 5.' A, strap 6 is secured dle free to rotate withoutimctioninguas a to the plate 3 to support the reduced end means for withdrawing tl-ieilateh. 'Thivsloc'k -1 of a latch bolt 8 having a shoulder`9 drilled is primarily intended fof'doors :locked .from as at 10..to provide a seat for a coiled spring l5 the inside, it beingeustdv aryiin the 'present .1l exerting pressure between the head of the day door construction fo'iff automobilesthat latchv bolt and the strap whereby the latch only one ofthe doors i sunil,ocked'lfrom ,thev bolt is normally held projecting .through the outside. The present locklem'iloys a novel opening 5. A latch bolt lever 12 'having a tripping mechanism operated y a lever exnotch 13 and a shoulder 14 is pivoted as at o tending( inside the automobile and may also 15 to a reduced portion of the latch bolt 8. '10..-

be operated from the outside by'ineorporat- Extending throughout the outside of the ing any suitable locking mechanism .on the door and adapted to support a handle is promarket at present for the purpose of operatvided a shaft 16, the inner end being squared in the trip mechanism, to support a lever 17 which projects into the rdinary locking mechanisms employed for notch 13 in the latch bolt lever 12. A lever 18 75 locking automobile doors, when in the locked pivoted as at 18 extends upwardly into the position merely prevent the outside handle interioiof the automobile and is provided from turning. It is well known to bea eomwith a slotted opening 19 into which a pin 20 mon expedient of automobile thieves to emcarried by the latch bolt lever 12 extends.

0 ploy an ordinary gas pipe` and insert it A lever 2l rotatably'mounted on the inside 80 over the end 0f the handle and vapply Sufl. 0f the dOOI is provided Wltll all integral illlll cient leverage to twist it off or break the 100k, 22 adapted to support the pivoted latch bolt This problem Stimulated the conception of lever 12. The plate3 is further provided with the present device in'which a novel mechaa 19g 231Whfh STVCS t0 maintain a Spring 5 mism is employed to tri-P the end of ,l lover 24 in a position with one end resting on the 85 pivoted to the latch whereby the level. is upper part of the sti-ap 6 and the other end moved out of engagement with the handle elcrtlllg Pressure downwardly Pon the projecting on the outside of the automobile, plvoted llltill bolt level' l2'. 4

40 the handle thereby being left free to-rotate. In Opel'll'tlm tlm Sllnft 16 ls rotated by tlle 90 With theseand'other Objectsin View my handle ou the outside of the automobile invention is fully set forth and more particumir-bh Cms wilful? ,t entl'llge the Side vla'rly pointed out in the appended claim refer- 0 e no L l lm me )y lt draw the latch bolt to permit the door to open. Like- 4 f fig had t0 the accompanylng dmWmgi wise the latch bolt may be drawn by swinging the lever 18 so that the pin 20 extending 95 Figure l 1S afmgmentyvew (lf-fm auto into the slot 19 causes the latch bolt to be lIlOblle dOOI Wltha POIIOD broken away t0 withdrawn. To look the mechanism the lever illustrate the locking mechanism; 21 is swung in a countei-clockwise direction Fi ure2 is afragmentary view of an autowhich causes the arm 22 to raise or trip the mobi e door with a portion broken away to latch bolt lever 12 to the position shown in ou A dotted lines, in which position the lever 17 no longer engages in the notch 13 and the handle on the outside of the automobile is therefore free to rotate without ali'ecting the latch bolt 8.

In Figures 2 and 3 the numeral 32 indicates a door having a cavity or recess 33 in which the plate 34 is inserted, a flange 35 having a.

latch bolt opening 36 formed on the plate 34. kA strap 37 supports the reduced portion 38 on the latch bolt.

A lever 46 is pivoted as at 46 to the plate 34 and has a slot 47 in which extends a pin 48 carried by the latch bolt lever 43, the upper end of the lever 46 extending upwardly into the interior of the automobile.

A disk 49 which is substantially circular in form and provided with a notch 49 is mounted on a stub shaft 50 which extends through theouter Wall of the door and has a handle 51 mounted on the outer end thereof. 52 is a handle mounted on a stub shaft 53 in such a manner that the handle extends into the interior of the automobile. On the inner end of the stub shaft 53 is formed a head having a,circular portion 54 and a flattened cam portion 55. A spring 56 is secured upon the strap 37 by means of a screw 57 to normally exert downward pressure on the latch bolt lever 43.

In the operation of this embodiment the handle 51 is rotated which causes the sides of the notch 49 to engage the lug 44 and withdraw the latch bolt 39 to permit the door to open. Likewise the latch bolt 39 may be withdrawn by swinging the lever 46 which has the walls of slot 47 engaging the pin 48 in the latch bolt lever 43. To lock-y this construction the lever 52 is rotated in any direction which causes the cam portion 55 to engage the lug 44 and raise it until it rests upon the circular portion 54 and thereby moves it out of the slot 49 in which position the outside handle 51 is :tree to rotate without aiecting the latch bolt 39.

The purpose of the slots 19 and 47 in the levers 18 and 46 respectively, is that these levers which extend-into the interior of the automobile are always in connection with the latch bolt so that the door may be opened from the inside of the automobile regardless of whether the outside handle is locked or not.

To convert the above described locking mechanism into one which may be unlocked from the outside of the vehicle the stub shaft 50 is formed as a sleeve in which is inserted n` barrel shaped loekine` mechanism 58 having a squared stem 58. The stem 58 projects into a squared opening-59 in stub shaft Although specific embodiments of my in-A vention have been illustrated and described it is to be understood that various alterations may be made in the details of construction without departing from the spirit of the invention as depicted in the following claim. What I claim is l A lock mechanism comprising a bracket adapted to be attached to a door, a latch bolt having aportion slidably received in said bracket and extendingoutwardly on each side thereof, a head formed on one end of said latch bolt, a coiled spring interposed between said head and said bracket, a latch bolt lever pivotally mounted on the opposite end of said latch bolt and havinga notch formed in the bottom thereof, a rotatable lever mounted adjacent the notch in said latch bolt lever, a leaf spring mounted on said bracket and normally forcing said latch bolt lever into contact with said/rotatable lever so that the latter may enter said notch, a shoulderv formed on the outer end of the latch bolt lever, and an arm rotatably mounted adjacent the outerI end of said latch bolt lever' and adapted to engage the same whereby rotation of said arm ralses said latch bolt lever, said arm having its axis of rotation located so that contact of the arm with said shoulder causes said latch bolt lever to be latched in a position wherein engagement is broken between the notch and the rotatable lever.

In testimony whereof I afx my signature.

JOHN B. COFFRON. 

